[NicoJuicy]

I think no,

Lilly = Swan, Swan = White, Bernhard = Green, Greg = Swan.

Color of Swan or Greg = White

[6d6b73]

the correct answer, especially for any AI system should be -

it likely that it's white but there is no way to know for sure.

Australian black swans are black, but chicks are light grey:) Lilly could be chick while Greg could be adult Australian swan

[mlnhd]

Greg is white. Also, Greg is Lily.